inheritance Archives - Graph Diagram

Dominant Inheritance. When a trait is dominant, only one allele is required for the trait to be observed. A dominant allele will mask a recessive allele, if present.

To be afflicted by an autosomal dominant inheritance, a person just needs one mutant copy of the gene. Each affected person typically contains a single parent who is also affected.

Autosomal dominant or dominance is a pattern of genetic inheritance that occurs within an autosome (non-sex chromosome). The way we look and function is most commonly the result of dominance of one parental gene over the other.

Dominant Inheritance Image Diagram - Chart - diagrams and charts with labels. This diagram depicts Dominant Inheritance Image

Autosomal recessive is a pattern of inheritance characteristic of some genetic disorders. “Autosomal” means that the gene in question is located on one of the numbered, or non-sex, chromosomes.

In recessive lethal inheritance patterns, a child who is born to two heterozygous (carrier) parents and who inherited the faulty allele from both would not survive. An example of this is Tay–Sachs, a fatal disorder of the nervous system. In this disorder, parents with one copy of the allele for the disorder are carriers.

Not all genetic disorders are inherited in a dominant–recessive pattern. In incomplete dominance, the offspring express a heterozygous phenotype that is intermediate between one parent’s homozygous dominant trait and the other parent’s homozygous recessive trait.

Recessive Inheritance Image Diagram - Chart - diagrams and charts with labels. This diagram depicts Recessive Inheritance Image